lol, I think your first post was clearer than the second. In any event, fourths are the same in major and minor keys as the 4th degree of any scale is unaffected by the minor tonalities. Also, if you are familiar with the circle of fifths, the circle of fourths is just this backward. Start at the tonic note, include it, and count 4 degrees up the scale, that gives you the 4th.
C-F
D-G
E-A
F-Bb
G-C
A-D
B-E